NAME       : HCPNTLBK
 DESCRIPTION: Network Lock Block.
 DSECT      : NTLBK (256 Byte Aligned)
 FUNCTION   :
              HCPNTLBK maps a 256-byte ALIGNED memory area that is
              intended to be used for a Lock that is required to be in
              it's own cache line for performance reason.
 LOCATED BY : Functions exploiting network locks.
 CREATED BY : HCPNIDNA
 DELETED BY : HCPNIDNA
 REFERENCES :
              HCPSYNBK - Formal Exclusive-Only SpinLock Block
 SERIALIZED :
              It is up to the callers of HCPNIDNA to ensure proper
              serialization is in place for the desired use of a
              NTLBK.
 RELOCATION CONSIDERATIONS : None
 COMPATIBILITY AND MIGRATION CONCERNS : None

 NTLBK DSECT
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Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      NTLBK          Network Lock Block.
0000    0 Dbl-Word     8 NTL$HDR        NTLBK Header
0008    8 Dbl-Word     8 NTLSPNLK (6)   Spin lock
0038   56 Bitstring    1 * (192)        Reserved for IBM use.
00F8  248 Dbl-Word     8 NTL$EYE        NTLBK Trailer
      End of the NTLBK.
          00000100       NTL$END        * End of the NTLBK
          00000100       NTLBKLN        256 Length of NTLBK in bytes
          00000020       NTLBKSZ        ((256)+7)/8 Size of NTLBK in
                                        doublewords
                                                                */

          
*** NTLBK - Network Lock Block.
*
*     +-------------------------------------------------------+
*   0 |                       NTL$HDR                         |
*     +-------------------------------------------------------+
*   8 |                                                       |
*     =                       NTLSPNLK                        =
*     |                                                       |
*     +-------------------------------------------------------+
*  38 |///////////////////////////////////////////////////////|
*     =///////////////////////////////////////////////////////=
*     |///////////////////////////////////////////////////////|
*     +-------------------------------------------------------+
*  F8 |                       NTL$EYE                         |
*     +-------------------------------------------------------+
* 100
*
*** NTLBK - Network Lock Block.

 
Symbol         Dspl Value
-------------- ---- -----
NTL$END        00F8 00000100
NTL$EYE        00F8
NTL$HDR        0000
NTLBKLN        00F8 00000100
NTLBKSZ        00F8 00000020
NTLSPNLK       0008